Answer:

Explanation:
Hello!
Slope is calculated by the formula 
.
- Rise is the change in y between two points
 - Run is the change in x between two points.
 
The two points I'm picking is (0,0) and (3,-4).
- The change in y (0 and -4) is -4.
 
- The change in x (0 and 3) is 3.
 
Therefore, the slope is 
.